the cheapest cell phone plan

pu1. If you talked about it when you signed up, there must be a plan for the duration of the plan. It's usually about six months old. You have to use that plan for six months, so check that part

2017-11-14

OK

pu2. If the contract is over, you can change any plan, but if you don't use any data, the standard plan is cheap. Or even if it's 30,000 won, you can use it easily

2017-11-14

OK

pu3. I don't know because you haven't mentioned how long you've been using your cell phone, but if you're done with the cell phone agreement (usually about two years), I recommend you to change to a thrifty phone

2017-11-14

OK